I'm going to be doing a pretty full internal overhaul of my BAR-10 G-Spec within the next week or so to bring it up to around 500 fps and there is just two things I was wondering about before I go ahead and order the parts.
Right now the only upgrades/modifications are a laylax 6.03mm tightbore (303mm G-Spec length), laylax barrel spacers, King Arms hopup rubber, chopped airbrake, and teflon taped cylinder head threading. Currently the rifle is shooting 385 fps w/ 0.2s (although I skirmish with 0.28s).
So now, onto question 1...
1) For the cylinder/trigger assembly upgrade I'm going with PDI 1st & 2nd sears, Laylax red piston, Laylax 150 spring, Laylax metal spring guide, and a Laylax spring guide stopper.
Now what I'm wondering about is the spring guide stopper... I have a BAR-10 G-Spec so should I get the "G-Spec" version spring guide stopper that Airsoft Atlanta sells? I know the BAR-10 is a complete VSR clone, but what I'm not sure of is if there was some subtle difference between the G-Spec trigger box versus the regular VSR trigger box that makes the spring guide stopper different or not. And if so, was that cloned as well?
Hopefully that made sense LOL To make it simple, "Will the Laylax VSR-10 G-Spec version spring guide stopper work properly with the JG BAR-10 G-Spec trigger box?"
Now for the longer and more complicated question...
2) With the gun's current internals the King Arms hopup rubber is absolutely horrible. Half my shots are on target, the other half go off 10 feet to the right or left at 170 feet. Everything on the inside has been cleaned throughly and I've followed every bit of TCF's advice for internal testing and maintenance, the problem has been narrowed down to the hopup rubber (as the gun shoots brilliantly with the stock rubber after washing and PTFE taping it).
So what I'm wondering is that I've heard the King Arms hopup rubber works best with rifles over 420 or so fps, and since mine is only shooting 385 could that be why I'm having horrible accuracy with my hopup rubber? In other words, will my accuracy problems with the KA hopup rubber go away when I upgrade to 500 fps? Or is it possible that I just got a bad rubber or the KA rubber doesn't play nice with Laylax barrels (since everyone I've seen who loved the KA rubbers used 6.01mm barrels, not 6.03mm)?
At this point I'm planning on just ditching the KA rubber when I upgrade to around 500 fps and getting a new rubber, but I have yet to decide between the Nineball and Firefly hard rubber. I know the Firefly should give me a great deal more range than the Nineball but I may lose some consistency. Some people seem to have this problem with Firefly rubbers, some don't.
Any thoughts on all this?